JPH0444875Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a drain pump for an air conditioner.

[Prior Art] Fig. 7 is a plan view of a conventional water pump according to Japanese Patent Laid-Open Publication No. 60-179000, and Fig. 8 is a cross-sectional view taken along the line X-X of Fig. 7. Reference numeral 1 denotes a motor, which is fixed to a mount 4 by a motor fixing screw 6. A motor shaft 5 is
It passes through an air hole 10 in the support 4, and an inverted triangular blade 2 is attached to the passed-through portion.
Reference numeral 3 denotes a casing, which is provided with a water inlet 8 on the lower side and a discharge port 9 on one side, and a partition plate 15 formed in a lattice shape.
and strainer portion 17, and further strainer portion 17
A fixed foot portion 16 is integrally formed on the outer periphery of the
The casing is attached to the support 4 by means of casing mounting screws 7. Reference numeral 11 denotes a pump storage section for the air conditioner when the water pump is installed.

A conventional drain pump for an air conditioner is configured as described above, and when the motor 1 starts rotating, the vanes 2 directly connected to the shaft 5 of the motor 1 start rotating, which applies centrifugal force to the water. . As a result, water is sucked in through the suction port 8 of the casing 3,
It is discharged from the discharge port 9. In addition, a strainer section 17 constituted by a partition plate 15 is provided to prevent pump clogging.

To explain the actual operation of such a pump when it is incorporated into an air conditioner, the pump operates when drain water generated from the heat exchanger during cooling operation is collected in the pump storage section 11. The electric circuit is configured so that the pump does not operate during heating operation.

[Problems that the invention attempts to solve] Conventional pumps are configured as described above.
The drain water that is generated during actual cooling operation when installed in an air conditioner contains minute dirt, dust, cigarette tar, oil, etc. that cannot be removed by the air conditioner's pre-filter (not shown). During the intermediate period or during heating, the remaining condensate evaporates and solidifies, and as this process is repeated, it gradually accumulates.
In addition, due to water stains and the above-mentioned contents in the drain water,
There were problems such as clogging (membrane formation) in the strainer, which increased the number of times the service was required to remove it.

This idea was made with the purpose of improving the problems mentioned above, and it drastically reduced the number of services.
The purpose is to extend the life of the air conditioner.

[Means for solving the problem] The drain pump for an air conditioner according to this invention has the following features:
The strainer is eliminated, and an arm protrudes from the lowest part of the inverted triangular blade toward the pump storage area further below, and a blade is provided at the tip of the arm.

[Function] The drain pump for air conditioners according to this invention eliminates the strainer by using blades at the end of the arm that protrude downward from the blades, eliminates the film formation at the suction port, and crushes the coagulated deposits in the drain water. and discharge it.

[Embodiment of the invention] Hereinafter, an embodiment of the invention will be described with reference to the drawings.

FIG. 1 is a plan view of the water pump, and FIG. 2 is a cross-sectional view along the line taken from FIG. 1. The structure of the pump storage section and fixed foot section is the same as that of the conventional example except that there is no strainer. Further, FIGS. 3 to 6 show other examples. In the figure, numerals 1 to 10 are the same as conventional pumps. Reference numeral 20 denotes an arm, which is integrally formed so as to extend further downward from the lowest end of the inverted triangular blade 2, and is also formed to protrude from the lower end of the suction port 8 of the casing 3 by the dimension "A". .

The pump configured as described above sucks in water from the suction port 8 and discharges water from the discharge port 9.

At this time, since the conventional strainer was discontinued, it is thought that the clogging that occurred in the conventional strainer part, for example, a membrane buildup, would occur in the suction port 8 part. While removing the film tension, etc., and crushing the solidified deposits with the blade 21 at the tip of the arm 20, they are sucked in from the suction port 8 and discharged from the discharge port 9 at the same time as fresh drain water.

The arm 20 in FIG. 2 has a protruding tip end shaped like a substantially bevel gear 21. As shown in FIG.
Further, the tip end portion 21 of the arm in FIGS. 3 and 4 is formed in a substantially S-shape.

Further, since the distal end portion 21 of the arm in FIGS. 5 and 6 is formed with a plurality of blades 21 facing in the direction of rotation of the pump, the same effect as described above can of course be obtained.

[Effects of the invention] As described above, according to this invention, drain drainage can be achieved with a simple configuration in which the strainer is eliminated, the arm is integrally molded and extends from the blade, and the blade at the end of this arm is protruded into the pump housing. Since it is easy to crush and remove the solidified deposits of condensate that has solidified through repeated storage and evaporation solidification, it is possible to drastically reduce the number of times the air conditioner is serviced, prolonging the life of the air conditioner, and improving the efficiency of the pump. It has great practical effects, such as improved reliability and a significant reduction in price.

[Brief explanation of the drawing]

Fig. 1 is a top plan view showing one embodiment of the pump according to this invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Figs. 3 to 6 show other embodiments of the invention. 3 is a bottom plan view of another embodiment seen from the lower suction side, FIG. 4 is an enlarged plan view of the main part of FIG. 3, and FIG. 5 is another embodiment corresponding to FIG. 3. Figure 6 is an enlarged plan view of the main part of Figure 5, Figure 7 is a lower plan view of
The figure shows a top plan view of a conventional pump.
FIG. In the figure, 1 is a motor, 2 is a blade, 3 is a casing, 8 is a suction port, 9 is a discharge port, 20 is an arm, and 21 is a blade at the tip of the arm. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A hollow inverted cone-shaped casing that is incorporated into an air conditioner and has a water inlet at the lower end and a discharge outlet at a part of the upper end, a motor is provided at the upper part of the casing, and is pivotally supported by the motor shaft. In the drain pump for an air conditioner that pumps up water by rotating the inverted triangular blades arranged in the casing, the pump of the air conditioner is housed, and the drain drain of the air conditioner is drained. a pump storage section in which water is repeatedly stored and evaporated and solidified; an arm integrally formed extending from the tip of the inverted triangular blade, which projects from the water suction port at the lower end of the casing to the pump storage section; A drain pump for an air conditioner, comprising: an arm tip blade portion provided at the tip of the arm for crushing coagulated deposits of the coagulated drain water.